What are catalysts?
3 marks · Easy(a)
[1 mark]
| Solid | Oxygen Produced (cm³) |
|---|---|
| W | 24 |
| X | 2 |
| Y | 0 |
Which solid appears to be the most effective catalyst for this reaction?
(b)[1 mark]
Suggest which solid does not act as a catalyst in this reaction.
(c)[1 mark]
Give a reason for your answer to part (b).
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Show answer
(a) W
(b) Y
(c) Because it produced no oxygen.
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · Identifies W as the most effective catalyst (highest oxygen production).
B1 (b) · 1 mark · Identifies Y as not acting as a catalyst.
B1 (c) · 1 mark · Gives correct reason based on zero oxygen produced.
Worked solution
a) W is the most effective catalyst, as it produced 24 cm³ oxygen.
b) Y does not act as a catalyst.
c) Because Y produced 0 cm³ of oxygen.